Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6bef974e59404d…

MALICIOUS

PDF

84.8 KB Created: 2021-09-20 09:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 24dd99540d613c0329c1fd98e0d7b36b SHA-1: 359d3d98fff971574c08a6977497bec41386a8da SHA-256: 2e6bef974e59404d80c56707587b1797ac8075ee6fb988a392347962f40529bb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting, commonly used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=handbrake+app+for+android PDF link annotation
    • http://hwayinn.com/image/files/20210912_193145.pdfIn PDF document text
    • https://underworldgear.com/admin/images/fckImg/file/tizoxiberoxuzuko.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353315a935c---waretupivebegoki.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/vedanegaxuwabojefixot.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/23050921374.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/wepupupekisiluparilegubuj.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/52470466005.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/jalevudures.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/12737790752.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/gevipalenizegegajivape.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/gexiwetora.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/16944150529.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xovoxilujexumamujazesi.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/vegibegepuguvej.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/lewijawuwezexaralonokame.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/17370425514.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/kegufuripilif.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/gexenidal.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/61438434897.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/dabuwuwokemujezurilu.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/27674853369.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140bff9d36be---fiwazezemikasemus.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE995 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A7 17396 bytes
SHA-256: 588a9666c26e5e2e69ac76c27654e370d58cb4f1f5c8cb0da5707472fd38bd8a
font_02_sfnt_off00012edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDC 10404 bytes
SHA-256: 4c9d893859d16c96227c392deb03faab6eb25db9148706deb8af0c46c573a947